13C NMR data are presented for 31 variously substituted derivatives of 9acridanone and 15 derivatives of 9-thioacridanone. Unexpected shifts are explained in terms of hydrogen bonding or tautomeric equilibria.
Carbon-13 NMR studies of substituted naphthalenes. I—complete assignments of the 13C chemical shifts with the aid of deuterated derivatives
✍ Scribed by José Seita; Jan Sandström; Torbjörn Drakenberg
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 652 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Proton‐coupled as well as noise‐decoupled ^13^C NMR spectra of several substituted naphthalenes have been studied. Complete assignments of the ^13^C signals based on selectively deuterated derivatives and on the ^13^C^1^H coupling pattern have been made. For the methoxynaphthalenes, acetylnaphthalenes and naphthaldehydes the dominant conformations of the substituents have been deduced from the ^13^C chemical shifts.
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Complete 13C spectral assignments of 28 aromatic methoxymethyl ethers bearing different substituents and substitution patterns were made. While mefa-, para-or mono-ortho-substitution did not significantly affect the 13C resonances of the carbon atoms of the methoxymethyl group, di-ortho-substitution